Lycoming O-480

Lycoming GO- 480 is the name of a piston aircraft engine of an engine family of the U.S. manufacturer Lycoming. All are assembled in modular form of air-cooled OHV 4- stroke boxer engines, six cylinders used here have a bore of 130.2 mm and a stroke of 98.4 mm. This results in a displacement of 7859 cc, corresponding to 480 inch ³, from which derives the pattern name. The engine was first introduced in 1954 and remained until 1978 in production. Other engines of the manufacturer with cylinders of the same dimensions, the two-cylinder Lycoming O- 160 and the four-cylinder Lycoming O- 320. How the G ( geared ) shows the name, the propeller speed is reduced by a gear with i = 1.5625 or i = 1.55844. Depending on the compression they were to operate with fuel from either 80/87 or 91/96 octane. All supercharged engines and rolling stock designed from the outset for operation with fuel of 100/130 octane had a piston cooling by oil spray.


The pistons are made of an aluminum alloy and each have two compression, an oil scraper ring and a Ölverteilring. The connecting rods have a double T- profile and are made ​​of forged steel. The crankshaft is composed of a chromium-nickel -molybdenum steel alloys, and is also produced by forging. After processing all bearing surfaces are hardened by nitriding. The crankcase is a vertically divided light metal casting. In the front bearing plate, a ball bearing absorbs the propeller thrust. All stock except for the piston pin bearings are lubricated by pressurized oil. The crankshaft is a mud sleeve that separates suspended solids by centrifugal effect. The piston pin as well as the piston path and the auxiliary drive shaft get their lubrication by spin oil. The existing light metal auxiliary equipment cover behind bolted to the engine and the oil sump. It contains the oil pump and the auxiliary drive shaft. On the cover starter, alternator, fuel pump speed shaft and the magnetos are attached.


  • GO- 480: Source engine, which was authorized on 21 April 1954. It remained in production until 1978 and makes depending on the model 260 hp at 3000 min -1 and 285 hp at 3100 min -1. It provided the propulsion of aircraft such as Aero 520/560 and Beechcraft Model 50 Both BMW in Germany and in Italy Piaggio acquired the manufacturing rights and built the motor for use in the well-known aircraft Dornier Do 27 and Piaggio P.149.
  • GSO 480: Supercharged version with the military designation O -480 -1. The engine delivers 320 hp at 3200 min -1. The compressor has a transmission ratio of 11,27:1. It was manufactured between 1955-1959.
  • IGSO 480: The first version of the engine with a single- point fuel injection. It received the military designation O -480 3 power is 320 hp at 3200 min -1. Built it was among others in the Dornier Do 28D. The production ran from 1960 to 1978.
  • IGO -480: Version with 280-285 hp at 3100 min -1, which was produced 1968-1978, and mainly used in the Aero Commander 680.

Technical data (IGSO-480 - A1F6 )

  • Bore: 130.2 mm
  • Stroke: 98.4 mm
  • Displacement: 7859 cm ³
  • Continuous power: 264 hp at 3000 rpm 1-3350 min-1
  • Start Power: 274 hp at 3400 min-1
  • Compression ratio: 7.3:1
  • Maximum cylinder head temperature: 246 ° C
  • Maximum cylinder liner temperature: 163 ° C
  • Octane rating of aviation fuel: 80/87 re: 100LL
  • Capacity of the oil pan: 11.25 l
  • Minimum oil quantity: 2.5 l
  • Minimum oil pressure (idle): 1.72 bar
  • Oil Pressure Normal operation: 5.17 bar
  • Ignition timing: 25 ° before o.T.
  • Firing order: 1-4-5-2-3-6
  • Weight: 226 kg
  • Length: 1208 mm
  • Width: 842 mm
  • Height: 570 mm
  • Propellers reduction: i = 1.5625


  • Jane's all the world 's aircraft 1971/72
  • Boxer engine (aviation )
  • Lycoming